The Earth designation for the 1994 Spider-Man animated series universe is Earth-92131.
The series shares its continuity with X-Men: The Animated Series, which explains crossover appearances by characters such as the X-Men, Beast, and Professor X. The designation was assigned through Marvel’s later multiverse reference material rather than being prominently stated during the original television run.
Spider-Man: The Animated Series aired on Fox Kids from 1994 to 1998 and ran for 65 episodes across five seasons. Its continuity includes several storylines that connect it to the animated X-Men universe, while remaining separate from the main Marvel Comics reality.
A common mix-up is Earth-616, the primary comics universe, or Earth-1610, the original Ultimate Comics universe. Earth-120703 is associated with a different Spider-Man continuity, not the 1994 cartoon.